Re: [libvirt] [PATCH] lxc: support <interface type='ethernet'>

This is identical to type='bridge', but without the "connect to a bridge" part, so it can be handled by using the same functions (and often even the same cases in switch statements), after renaming virLXCProcessSetupInterfaceBridged() to virLXCProcessInterfaceTap() and enhancing it to skip bridge-related items when brname == NULL. To be truly useful, we need to support setting the ip address on the host side veth as well as guest side veth (already supported for type='bridge'), as well as setting the peer address for both. The <script> element isn't supported in this patch because I have no need for it. I'd rather add it after determining it's needed rather than adding it for no reason and than being required to support it forever.